George s



(No Model.)

G. S. BLACK.

BRAZING'MAGHINE.

No. 353,245. Patented Nov. 23, 1886.

IN VEJVTOR.

WITNESSES N. PLTCRS4 Phmo-Lum m nw, Washmglom n. c.

IJNITED STATES GEORGE S. BLACK, OF

PATENT OFFICE.

INDIANAPOLIS, INDIANA, ASSIGNOR TO E10. ATKINS & COMPANY, OF SAME PLACE.

BRAZlNG-MAtDHINE.

SPECIFICATION forming part of Letters Patent N0.353,24-5, dated November23. 1886.

Application filed June 1:, 1886. Serial No. 205,588. No model.)

T aZZ whom, it may concern.-

Be it known that I, GEORGE S. BLACK, of the city of Indianapolis, countyof Marion, and State of Indiana, have invented certain new 5 and usefulImprovements in Brazing Machines, of which the following isaspecifieation.

The object of my said invention is to produce an apparatus by which theends of bandsaws can be firmly held while being brazed together. 7

It consists ofa main bar or plate upon which the saw rests, andadjustable clamps by which it is secured in the desired position, andalso by which the brazing'bars are secured against the sides of thesawends which are to be operated upon.

Referring to the accompanying drawings, which are made a part hereof,and on which similar letters of reference indicate similar parts, Figure1 is a front elevation of my in1- proved apparatus 5 Fig. 2, a top orplan View of thesame; Figs. 3, 4, and 5, transverse vertical sectionalviews,looking toward the right from the dotted lines 3 3, 4 4, and 5 5,respectively,

2 5 on an enlarged scale; and Fig. 6, a detail longitudinal sectionthrough the saw ends and immediately adjacent parts, on a still furtherenlarged scale.

In said drawings, the portions marked A represent the main plate or barof the apparatus; B, the lower clamping-bar; O, the upper clampingbar;D, a swinging bar or frame which carries the upper clamping-bar; E E,

the brazing-bars, and F the saw.

The main plate or bar A is also the frame of the apparatus. It is planedtrue. upon the upper side, and the saw-plate rests thereon during theoperation of brazing. Several overhanging projections, A, are providedin 0 which are clamping-bolts a, which, when the saw is in position, arescrewed down upon said saw, and thus hold it firmly. It also has agroove to receive the lower clamping-bar, and projections or standardsA", to which the car- 5 rying-bar for the upper clamping-bar is pivotedor hinged.

The lower elampingbar, B, is in the main a simple straight rectangularbar, which rests in the groove provided to receive it in the centralportion of the plate A. It is adapted to be adjusted in said groove asdesired, and

said adjustment is effected by means of handscrews A a, which aremounted in screwthreaded holes in the plate A, beneath said clamping-barB, as shown most plainly in Fig. 3.

The upper clamping-bar, C, is secured to the carrying-bar D by ahand-screw, O, by which it is moved up and down, as desired. Additionalhand-screws, G .0, are provided which operate upon the ends of thisclampingbar, and thus pressure can be brought upon its ends to anydesired extent, as well as upon its center. I

The carrying-bar D is secured to the standards A by a pivot, d, and whenin operative position extends across the plate A parallel with theclamping bars B and C. It is provided on its forward end with catches D,which are secured thereto bya pivot-bolt, d, and are adapted to engagewith or hook under the main plate A, as shown. (See particularly Fig.4.) Upon the sides of this carrying-bar D are lugs d which serve asstops and prevent said carrying-bar from dropping too far forward, and 75 upon the standards A are lugs a which serve as stops to prevent saidcarrying-bar from dropping too far back when raised up.

The brazing-bars E E are simply two flat bars having appropriatehandles, the operat- 8o ing portions of which are substantially the sizeof the clamping-bars B and O, and are adapted to be placed between theadjacent faces of said clamping-bars. As these brazing-bars are to beheated to a high temperature their handles are usually of considerablelength.

The operation is as follows: The ends of the saw F are first mitered, asshown in Fig. 6, and brought together at the center of the clamp- 0ing-bars, after having been properly treated and the proper flux andsolder applied. The brazing-bars having meantime been heated to theproper temperature, are placed one on each side of said saw ends, andare forced 9 5 tightly against them by means of the handscrews operatingupon the clamping-bars, as will be readily understood, and are allowedto remain in this position until nearly or quite cool. "When theoperation has been comzoo pleted, the handscrews are loosened upsomewhat, the catches D are swung out from their engagement with theplate A, the carrying bar carrying the upper clampingbar is swung backuntil it rests against the stops a", the clamping-screws a are loosenedup and the saw removed.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination, in a brazing-machine, of a main plate or frame, A,having a transverse groove, and projections or standards alongside saidgroove, a cl amping-bar arranged in said groove, a bar pivoted to saidstandards carrying a second clamping-bar, catches for securing saidpivoted bar in operative position, and handscrews for forcing theclamping parts toward each other.

2. The combination of the main plate A, the overhanging projections A,with clampingscrews therein, the carrying-bar D, two clamping-bars,brazing-bars, and hand screws for operating the same.

3. The combination of the main bar or plate A, having a transversegroove and standards, a elampingbar arranged in said groove, acarrying-bar having a second clampingbar attached, pivoted to saidstandards, means for securing the free end of said carrying-bar, andstops upon said carrying-bar and said standards to limit the, movementof said carrying bar in either direction, substantially as set forth.

4. The combination, in a brazing-machine, of a plain surface upon whichthe saw to be' brazed rests,and bars which come in immediate contactwith both sides of the parts to be operated upon, which are adjustablevertically by means of hand-screws arranged above and below said parts,substantially as set forth.

5. The combination, in a brazing-machine, of a bar or plate upon whichthe saw to be brazed rests, brazing-bars which come in immediate contactwith the saw ends, clampingbars, and means for operating saidclampingbars.

6. The combination, in a brazing-machine, of a bar or plate forming aframe for the ma chine and a rest for the saw, clampingbars arrangedtransversely of said plate, a swinging bar carrying the upperclampingbar, and catches for holding said swinging bar in position.

I11 witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 7th day of June, A. D. 1886.

GEORGE S. BLACK.

In presence of- 0. BRADFORD, W. E. MURBARGER.

